These are 55mm  Blade Propeller Propeller for  Motor DIY Micro Quadcopter. The propellers with 0.95mm mounting hole can be firmly mounted onto 1mm 4-axial motors.

Features:

• Material: Glass Fiber.
• Total Length: 55 mm.
• Propeller diameter (ID): 2.9 mm.
• Color:  Black & Red.
• Durable plastic construction
• Strong and lightweight

Packing List

1 x 55mm Blade Propeller Propeller